Flexible working hour, free sodas, nice gym membership, parking well available, once a month a party with wine. For interns there was also a subsidized car rental -- a good thing to take to see around, even though not a necessity for commuting as the company accommodation is just across the road.

Cons

working in offices with very thin walls, if someone on the other side is having a lot of phone calls, it may get a bit disturbing. No free food as google has, having at least some fruit available through day would be nice...